Determination of C, P and S in Steels by Time-resolved Atomic Emission Spectrometry
1990 Volume 30 Issue 11 Pages 991-996
Details
1990 Volume 30 Issue 11 Pages 991-996
The time-resolved method has been applied successfully to the determination of a trace amount of elements C, P and S in steels.
The following results were obtained by the use of the intensities measured after the time of 50 μs elapsed relative to spark discharge initiation:
(1) A higher precision analysis was performed. The repeatabilities with standard deviations at a elemental concentration of 10 ppm were 3.7 ppm for C, 0.8 ppm for P and 0.5 ppm for S.
(2) Spectral interferences were almost avoided. The concentration correction factors were 0.16×10-4 for an interference of Ni on the PI 178.29 nm line and 0.2×10-4–5.8×10-4 for that of Mn on the SI 180.73 nm line.
